Influence of Backside P-Region Width on the Overcurrent Reverse Recovery of High-voltage RFC Diodes.
Proceedings of the 2020 4th International Conference on Electronic Information Technology and Computer Engineering(2020)
摘要
Based on 2D device simulation, this paper reveals the influence of the backside p-region width on the overcurrent reverse recovery of high-voltage relaxed field of cathode (RFC) diodes. Through the study of 3.3kV diodes with different backside p-region width, it is found that the width affects the maximum transient lattice temperature. The most likely mode of destruction is local heating caused by a large number of small current filaments converging into strong current filaments. The smaller the width of the backside p-region, the more easily a large number of small current filaments gather together to form an uneven distribution of strong current filaments. When the optimum value Wp-region = 100 μm, the overcurrent ruggedness of the device is fully improved.
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